55 56 2 TON w hvy duty 2nd Ser 57 58 Ser 6 4 left and right 55 58 2 SPD 2nd Ser left 29 splines 1 wide forged 3708820 4 4 l 3708818 A R 12 45 747 55 58 2 SPD 2nd Ser right 29 sp1ines 2L wide forged 3708820 e l 3708820 1 12 45 747 57 58 PASS CORV w P Trac 3745317 2 3 60 216 58 Pg TON w P Trac right and left 20 splines 2370717 2 3 70 222 5 529 GEAR ASSEMBLY Ring and Pinion not sold separately NOTE See group 5 510 for truck pinion with gear riveted to differential case NOTE Part numbers in parentheses are stamped on ring gear and pinion respectively 35 36 EA EB ED FA FB FD use w 125630 rear pinion brg 37 39 COMM 37 9T 375040 595901 602476 1 29 10 1746 39 42 VF WD Y M w 2 SPD 19 8T 3889M117 3890L 222 603771 1 66 65 3939 40 KID KE KF 41 9T hypoid 3652526 27 604400 1 36 30 2178 40 52 PASS exc P G l 41 11T hypoid 595022 3652285 604397 1 39 95 2397 40 52 PASS exc P G 53 SDL 37 9T hypoid 3652178 3704417 3705430 1 46 05 2763 40 53 TON 37 9T hypoid 3652510 3704461 3705439 1 46 05 2763 40 WD 41 55 1 TON lst Ser 38 7T hypoid 3652282 3652547 604416 1 58 25 3495 40 WD 41 56 UTILITY prod 57 58 Ser 4 exc 2 SPD 37 6T hypoid 3652522 3552549 604427 1 61 05 3663 41 42 COMM exc L4 TON 41 9T hypoid 3652526 3657709 605179 1 30 20 1812 46 58 TON exc D D 32 7T hypoid 3682104 03 l 609797 1 47 65 2859 46 58 D D 1 TON 36 7T hypoid 3682146 45 609798 1 47 65 2859 46 2 SPD w Mech Shift 19 8T 3889K193 38901 270 609846 1 71 65 4299 46 55 2 SPD w Vac Shift lo ratio lst Ser 23 8T 3889M221 3890C 289 609962 1 85 40 5124 50 54 PASS w P G 39 11T hypoid 3691464 3704411 3705262 1 43 30 2598 53 PASS Reg Prod exc P G SDL 54 PASS Reg Prod exc P G 37 10T hypoid 3697720 3703799 3705261 1 43 30 2598 53 55 CORV 39 11T hypoid 3691464 3704479 3727525 1 40 55 2433 54 2 TON 39 10T hypoid 3697702 03 3707516 1 44 60 2676 54 55 2 SPD w Vac Shift hi ratio 1stSer 22 7T 388912252 38905 331 3707547 1 85 40 5124 55 56 PASS exc P G O D 56 CORV w 3 SPD 3 70 ratio 37 10T hypoic1 3725864 65 3748433 1 44 60 2676 55 56 PASS w P G 56 CORV w P G 32 9T hypoid 3731604 3731617 3729466T 1 44 60 2676 55 58 PASS w O D 57 58 OORV w 4 11 axle ratio 37 9T 11ypoid 3733908 3733912 3748434 1 44 60 2676 55 58 li TON exc O D P Trac 39 10T hypoid 3697702 3740874 3747808 1 51 85 3111 55 56 Egg TON w O D 2nd Ser 37 9T hypoid 3652510 3708869 3727527 1 47 65 2859 55 56 2 TON w hvy duty 2nd Ser 57 Ser 6 w 6 17 axle ratio 37 6T hypoid 3711488 89 3718100 1 82 80 4968 55 56 2 TON w hvy duty 2nd Ser 57 58 Ser 6 w 7 20 axle ratio 36 5T hypoid 3711416 17 3718101 1 82 80 4968 55 58 2 SPD 2nd Ser 32 5T hypotd 3702244 3711483 3717213 1 82 80 4968 56 CORV w 3 SPD 3 27 ratio 36 11T hypoid 3720034 35 3724994 1 40 55 2433 57 PASS exc A T O VD 57 CORV w P G 32 9T hypoid 3731618 3731617 373989969 1 44 60 2676 57 58 PASS w A T 37 11 1 hypoid 3735390 3736508 3748437 1 44 60 2676 57 58 CORV ex P G 37 10T hypoid 3737957 3733910 3748438 1 44 60 2676 57 58 CORV P Trac w 4 56 axle ratio 41 9T hypoid 3720089 90 3748447 1 45 40 2724 57 1 p TON w O D 37 9T hypoid 3652510 3740875 3747809 1 47 65 2859 58 PASS exc O D A T 58 CORV w P G 32 9T hypoid 3731618 3731617 3748439 1 44 60 2676 58 lgg TON w 3 70 ratio 37 1OT hypoid 3711420 3744091 3749020 1 51 85 3111 58 1 TON P Trac w 3 92 ratio 47 12T hypoid 2354373 2354374 2354371 1 43 00 2580 TNOTE On early design jobs this unit contained gears having 39 1 1T hypoid 3725830 31 which is same ratio Used with P Trac requires P Trac differential unit 3743941 group 5 510 BUsed with P Trac requires P Trac differential unit 3743839 group 5 510 5 52g 5 52g 536 I Rsvisrsn FEBRUARY 1 1 s